The effects of parametric speaker sound on salivary hormones and a subjective evaluation. Lee S, Katsuura T, Towatari-Ueno T, Shimomura Y. Journal Article 2010; 31(4): 524-529 PubMed PMID: 20802441 Keywords: Adult, Analysis of Variance, Humans, Hydrocortisone:analysis, Immunoenzyme Techniques, Male, Saliva:chemistry, Sound,. Citation OBJECTIVE: Recently, a parametric speaker system has been developed. However, the safety of the parametric speaker for the human body has ..... Read abstract Full text PDF